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 Replies: 10 / Views: 1,895 |
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Valued Member
United States
484 Posts |
I have a few coins that appear to have an extra line here and there and then I have coins that the lettering looks blown out or details are doubled. Still new to error coin collecting and want to know as much as possible.
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Pillar of the Community
United States
7510 Posts |
 to Community. That's a great question and it is one of the most frequently discussed topics on this Forum. There are numerous topics and references and tutorials available on this site along with pictured tutorials. Just type the subject in the upper left search box and they'll be at your disposal, but I tell you, it is a lot of fun to learn it. I'll kick start you with the link below: http://goccf.com/t/245603Edited by Chase007
10/28/2020 11:16 am
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Pillar of the Community
 United States
2843 Posts |
A simplified answer to your question is. Machine Doubling is a result of an event that happens during the strike of a coin. A shift in the die causes the image to be distorted and appear doubled. A true doubled die is a result of a die variety. The die that struck the coin had a doubled image on it, and it imparted that onto the coin. |
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Bedrock of the Community
United States
62064 Posts |
If coins are damaged with incuse marks, they are just face value coins. So as everyone asks about a 'Blind date', "Got any pictures?" LOL
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Forum Dad
 United States
24154 Posts |
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Bedrock of the Community
United States
62064 Posts |
Another good read is this one on the forum on what makes a doubled die. Spread. http://goccf.com/t/315550So between the two, you can see what is Machine Doubling and what makes a coin a doubled die, what to look for. "Spread, what is it." |
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Moderator
United States
56855 Posts |
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Valued Member
 United States
484 Posts |
Thank you for your help and if I am to understand this correctly,and please let me know if I am wrong, but I chose these 2 coins from my collection. The second is Machine Doubling and the first one is a doubled die?   Edited by My2cent
10/28/2020 11:05 pm
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Moderator
United States
56855 Posts |
First off,you will need to post in focus photos. 1st coin is MD (I think,because it is blurry). 2nd coin looks like Ridge Ring,not a doubled die. John1  |
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Bedrock of the Community
United States
62064 Posts |
Machine Doubling affects the outsides of the devices. This is caused by the machine right after the strike. A doubled die has doubling on the die. So all coins will show the same doubling. Machine Doubling varies from strike to strike. What is missing between the two? Spread. One centers of the devices, the devices there , are enlarged. For a better understanding of this, check back on the read I suggested on the section listed: 'Part 2', for an in depth presentation of this subject. The second coin is a die wear issue seen on the cents with zincolns. The design has a lower profile, thus the die wear is different than the older die processes. These are call single squeeze dies. The doubling on these dies are more confined to the central areas of the designs. The outer areas suffer from die wear, as seen exactly like your coin. Neither are doubled dies.
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Valued Member
United States
484 Posts |
Okay I think I'm getting more of an understanding. and I do apologize about the quality of the pictures I only have my phone to rely on for that
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Replies: 10 / Views: 1,895 |
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Posted 10/28/2020 11:18 am
